PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 331 
the scales. Between the two lateral keels are traces of another keel; 
traces also exist between the two dorsal keels in front. 
The spines are developed on all the keels except in front and behind 
on the two abdominal ones. The two dorsal keels, at about the eighth 
scale in front of the caudal fin, coalesce, after which the median furrow 
is obliterated and the spines continue double. 
Just below the point of junction the abdominal keels also unite. The 
two lateral ridges remain distinct throughout. At the base of the tail, 
on each side, is a median spine between the lateral ridges. 
The abdominal ridges are farthest apart behind the base of the ven- 
trals, in front of which and behind which they converge, but anteriorly 
they do not meet. Breast with six or eight polygonal plates. Belly 
transversely convex, with traces of a furrow, into which the ventrals 
are depressible. Vent just behind the middle of the length of ventrals. 
Lateral line about forty. 
Dorsal beginning behind the seventh dorsal scale, and extending over 
eight scales, four scales intervening between it and the soft dorsal, 
which covers seven scales. The anal begins under the end of the first 
dorsal, and extends over eleven scales. Dorsal spines very delicate and 
flexible. Pectorals reaching. the eleventh scale in the upper lateral 
series. Ventrals beginning opposite the fifth scale and extending to 
the tenth. 
Color nearly obliterated—dark brown, with blackish cross-bars, involv- 
ing the fins. One bar across caudal, one across posterior part of soft 
dorsal and anal, one across posterior part of spinous dorsal and front of 
anal, and one across front of spinous dorsal. Pectorals black, with 
whitish edging. Caudal and ventrals blackish. Belly white. 
Dimensions, in hundredths, of length to base of caudal fin. 
Dovel leit SS S5eeeenec secs Caen nes os ARS Aer Cen Cone Meee oeae 4.1 inches 
ihn lime OH CRUG RINSE Ass SoBe oe See er ee Ce See eee eae A seme 3.6 inches= 100 
Sie ERP OY) tam ee tee ae niaey == oon ania ew wio =) nin ain sini ania nin = wim wim ai me = 12 
DDE ITD CPTI Tulasi eS te ee el I I ee) ee Ieper earae ee 4 
VIN iguidiy @it WOU 2 cid est odie bag Bee Renee Rene AIErby HERE e Dao pae emt raerc 14 
Wienennet Reade spore art tian)... ts aa Sato es Sess cmc acini dona aes 25 
Willa Or henGl e335 5ecer se CCe DOCS EE COUR ERD EnEO caeC ES Orns als Sonbococteenecose 19 
Taji Citas Se eee eee See ABE eeeS cr Sno Sere: cose ern Perera S rn: 12 
Diamar af ORD. «ks eeadet ae ee eee a nhe Sas ie Seen he eeemeeraeec 7 
De PANE TE SOP Ae 2 ees oie ee esr ee 9 
een ros ale Nping 286s 242i 6. 12 Link Js doe eee eee setee cee sane = n= 2.3 
Slot Me MROUG EL sei oet ote 2 acl). - 14 = - p's ise an isn elon een teeta. saa 6.5 
Wicd Or TOT NYS Go eeee Cane eee ee BEES noe Done, cepa On can Goss saps cae osee 6.5 
Winall or Grecia Oi RCE SS Be Se Serene Saba node se socds- omer ce ecee cade Snes. GEO 
Sea COMMU OESAINE ho 6 oo. oface canna cael see Seltae < Sane waoletin meni e =o m =o 8 
From front of mandible to tip of rostral spine -.-.-..-..---.---.-------------- 6 
Tiga 54. Sos eek eS Ses Be ene gee OS 455 Oe CEASE SOROS Sete Se Troe rae es 6 
enepmorspimons dorsal 2.25252. -- 22 = 2. s\oss = gemeeewe meinen amen eens =e 2 += 12.5 
Meesm ech emis T@ OTSA 5 oe ons nah wo carmen Semein ga snm SHidisiam see- anne o-2- 12.5 
Baier aR AR eer ets cg a spin) cima acing sista swipe = = -)0'= ='2 sain 03 18 
Renepiier pectoral 22) .-J-\) 2. -/2 22. - J-2 22s 2s 2 22-2 - = --- = -- 2+ oe eee 18 
Mexapilwotevemtralese wae 5222 LH 25 at eke aes ce ceibe ae. nn eon ees enn s sere 8 
Mgesteec ht Cou al a 8 =o an nyse ao cate cine aiclenloainine a awe» mae on'a'ninn sein ain sins 13.5 
